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http://dx.doi.org/10.4191/KCERS.2010.47.5.457

An Effect of Fe2O3 Additive on a Seebeck Coefficient and a Power Factor for SmCoO3 Perovskite System  

Jung, Kwang-Hee (Energy Materials Center, Green Ceramics Divsion., Korea Institute of Ceramic Engineering and Technology (KICET))
Choi, Soon-Mok (Energy Materials Center, Green Ceramics Divsion., Korea Institute of Ceramic Engineering and Technology (KICET))
Seo, Won-Seon (Energy Materials Center, Green Ceramics Divsion., Korea Institute of Ceramic Engineering and Technology (KICET))
Park, Hyung-Ho (Department of Materials Science and Engineering, Yonsei University)
Publication Information
Journal of the Korean Ceramic Society / v.47, no.5, 2010 , pp. 457-460 More about this Journal
Abstract
$SmCoO_3$ system was investigated for their application to themoelectric materials. All specimens showed p-type semiconducting behavior and their electrical conductivity ($\sigma$), Seebeck coefficient (S) and power factor were measured at high temperature. And the effect of dopant ions on their thermoelectrical properties were also investigated. $Fe^{3+}$ ion doped into $Co^{3+}$ site enhanced the Seebeck coefficient and decreased the electrical conductivity simultaneously. The maximum Seebeck coefficient value for 60% doping case reached to 780 ${\mu}V$/K at $240^{\circ}C$. However $Fe^{3+}$ doped system cause an negative effect on power factor value. In case of the pure phase, the maximum Seebeck coefficient value reached to 290 ${\mu}V$/K at $240^{\circ}C$ and the maximum electrical conductivity was obtained 748 1/(ohm$\times$cm) at $960^{\circ}C$. As a result, the maximum power factor was obtained $1.49\times10^{-4}$ W/$mK^2$ at $550^{\circ}C$.
Keywords
Themoelectrics; $SmCoO_3$; Perovskite; $Fe_2O_3$; p-type semiconductor;
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  • Reference
1 Q. Yao, D. L. Wang, L. D. Chen, X. Shi, and M. Zhou, "Effects of Partial Substitution of Transition Metals for Cobalt on the High-temperature Thermoelectric Properties of $Ca_3Co_4O_{9+\delta}$," J. Appl. Phys., 97 103905 (2005).   DOI
2 L. Sudheendra, A. R. Raju, and C. N. Rao, "A Systematic Study of Four Series of Electron-doped Rare Earth Manganates, $Ln_xCa_{1-x}MnO_3$ (Ln = La, Nd, Gd and Y) Over the x = 0.02–0.25 Composition Range," J. Phys.: Condens. Matter, 15 895-905 (2003).
3 Y. Liu, Y. Lin, Z. Shi, and C.-W. Nanw, "Preparation of $Ca_3Co_4O_9$ and Improvement of its Thermoelectric Properties by Spark Plasma Sintering," J. Am. Ceram. Soc., 88 [5] 1337-40 (2005).   DOI
4 K. Fujita, T. Mochida, and K. Nakamura, "High-Temperature Thermoelectric Properties of $NaxCoO_{2-\delta}$ Single Cyrstals," Jpn. J. Appl. Phys., 40 4644-47 (2001).   DOI
5 R. Funahashi, I. Matsubara, H. Ikuta, T. Takeuchi, U. Mizutani, and S. Sodeoka, "An Oxide Single Crystal with High Thermoelectric Performance in Air," Jpn. J. Appl. Phys., 39 L1127-L29 (2000).   DOI
6 R. Koc and H. U. Anderson, "Electrical Conductivity and Seebeck Coefficient of (La, Ca) (Cr, Co)$O_3$," J. Mater. Sci., 27 5477-82 (1992).   DOI
7 Y. Miyazaki, "Crystal Structure and Thermoelectric Properties of the Misfit-layered Cobalt Oxides," Solid State Ionics., 172 463-67 (2004).   DOI
8 R. D. Shannon, "Revised Effective Ionic Radii and Systematic Studies of Interatomie Distances in Halides and Chaleogenides," Acta Cryst., A32 751-67 (1976).
9 Joseph P. Heremans, V. Jovovic, Eric S. Toberer, A. Saramat, K. Kurosaki, A. Charoenphakdee, S. Yamanaka, and G. Jeffrey Snyder, "Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States," Science, 321 554-57 (2008).   DOI